We can use the following settings to change via Server Console Decision Services Options tab with 5.5 and prior version.

 1) Decision Service Automatic Update Service
 2) Decision Service Performance Monitoring Service
 3) Decision Service Time Interval Performance Analysis Service / Windowed Performance Metrics Collection Service
 4) Decision Service Results Distribution Analysis Service
 5) Diagnostic Data Service

It is very convenient and helpful that user can control those during the Server sessions, without stopping / restarting the Corticon Server.
Hence of this, I hope also Web Console can control those services via not only brms.properties but also UI.

Best regards,